from cbs' "the talk, ayesha tyler, ben stein, julie mason, and stand-up guy, pete dominick. cnn's own isha sesay, "the cake boss's buddy valastro. on "a.c. 360's" all the best, all the worst, 2012. welcome. i'm tom foreman and this was a year for living dangerously. whether flirting with the fiscal cliff or skydiving from the edge of space or just buying a powerball ticket, risk-taking was back in vogue. and as we head into the new year, we're going to look back at all the risky business that brought us here, in the economy, in entertainment, in sports, in pop culture, in technology, and in the biggest, baddest game of all. give it to the twin pillars of politics, the relentless candidates barack obama and mitt romney, for waging the best and worst presidential campaign of the year. >> thank you, thank you, thank you! >> thank you so much! >> best, because it was at times, a riveting battle for control of the nation. worst because it often became a war of cheap shots, questionable facts, and everything else that just exhausts voters. >> i don't think there's anything else th